Dust separator



Jan., M49 M939.. R, RUEMELMN L74334 DUSTl SEPARATOR Filed Nov. 26. 19242 sheets-sheet 1 Jan. M, 1930. R, RUEMEUN 343,934

DUST SEPARATOR Filed Nov. 2e, 1924 2 sneetshet 2 Fai-n n if PatentedJan; i4, 1930 OFFICE RICHARD RUEMELIN, F ST. PAUL, MINNESOTA.'

DUST SEPARATOR Application led November 26, 1924. Serial No. 752,436.

This invention relates to improvements in dust separators and devicesparticularly designed for use in separating or removing from a currentof air, such materials as floating dust, grit, sand and otherheavier-thanair particles, and more particularly is an improvement overthe form of dust collector shown in my Patent' 1,601,148, issued Sepetmber 28, 1926. Y

An object of this invention is to provide a dust collextor having aplurality of dust collecting. bags or bag-like screens arranged therein,and each such bag preferably being Adivided into a plurality ofintercommunieating compartments, through which the dust-laden air mustpass for nal cleaning and filtering.

A further object of the invention is to provide'a dust collector havinga simple and aoin'expensive means for vretaining vthe lower;

ends of the bags in open dust and air-receivingposition, means jalsobeing provided for demountably securing theopen ends of the bagsthereto.

` A further object is to provide such a device having means forsimultaneously shaking or agitating'all of'the dust V'collecting bagsfor the purpose of dislodging and removing therefrom all of theheavier-than-air material which has accumulated therein and causing itto be precipitated into the lower portion of the vstructure, such actiontaking place only when the flow of airfthrough the device hasv beeninterrupted. l

Other objects of the invention will appear from thefollowing descriptionand the accompanying vdrawings and will be more par- .ticularl-y pointedout 'in the annexed claims.A

vIn the accompanying drawings there has been disclosed a structuredesigned to carry out the various objects of the invention, but it is tobe understood that jthe invention is not confinedA to the exact featuresshown, as various changes may be made within the .scope ofthe claimswhich follow. In thev accompanying drawings forming part of thisspecification,

Figure l is a view in sectional-elevation taken on the line 1 1 ofFigure 2, showing the invention applied to a dust collector;

Figure 2 is a cross sectional view on the line 2-2 of Figure 1, showingthe preferred manner of supporting the dust collecting bags in theapparatus;

Figure 3 is a detail plan view of the frame to which the lower open endsof the bags are demountably secured;

Figure 4 is a sectional plan view showing the means provided for shakingthe bags;

Figure 5 is an enlarged detail view of the bag supporting means, alsothe means provided for demountably securing the lower open ends of thebags to the supporting frames;

Figure 6v is a perspective view of one of the bags removed from theapparatus;

` Figure 7. is a det-ail viewl showing a modified construction of themeans for securing the lower open-ends offthe bags to the sup-4 portingframe; :and

Figure 8 is a view showing a modified con struction of the bag shakingmeans.

In the selected embodiment of the invention here shown, there isillustrated a dust collector similar to the one shown in the abovementioned prior pendingapplication, comprising a casing 1l having ahopper 12 provided in the lower portion thereof, as

shown in Figure 1. An intake openingl is provided in the upper portionof the casing'and communicates with an expansion chamber 14 arrangedwithin the casing 11.v A discharge opening 15 is provided 'in the lowerportion of the expansion chamber 14 through which the -heavier particlessuch as sand and grit may be precipitated into the hopper 12therebeneath. The lighter materials will be carried with the dust-ladenair from the chamber 14 through ports 16 provided in the wall 17 oftheexpansion chamber 14. ,o Difusers 18 are preferably provided within thecasing 11 adjacent the port-s 16 to diffuse or distribute the aircurrent so as to produce a uniform velocity of the air through thecasing and also for the purpose of avoidng'a whirling orshort-circuiting action. Y

An important feature of this invention resides in ,the novelconstruction and ar-vV rangement. ofthe dust-collecting bags or screens19 which are mounted within a clean air chamber 21, composed on threesides by the walls of the casing 11 and having an inner wall 22preferably of a fine meshed screen or cloth, through which air may passfrom the interior of the casing 11 and into the clean air chamber 21.(See Figure 3.) As shown in Figure 6, the dustecollecting bags resemblein form an open-ended bag having a series of stitchings 23 providedlongitudinally thereof in the intermediate portion of the bag. Thesestitchings unite the opposite sides of the bag, thereby substantiallyproviding a series of inter-communicating compartments within each bag,the upper and lower ends of the compartments being in directcommunication with one another as a result of the stitchings 23extending only partially the length of the bag.v The lower open end 24of each bag is preferably provided with a beaded edge 25 which isadapted to be seated in an annular groove 26 provided in the uppersurface of a frame 27 forming the lower wall of the clean aircompartment 21. Suitable cleats or strips 28 are provided for` securingthe edge of the bag to the frame 27 as shown in Figure 5. These stripsor cleats may be conveniently secured to the frame 27 by such means asscrews or nails. A plurality of elongated openings 29 are provided inthe frame 27 and these openings are arranged to register with the openend of the sack when it has been secured tothe frame as shown in Figure5. The upper end of the bag is yieldingly secured to avsupporting bar 31having its ends suitably secured to the-side walls of the casing 11 asparticularly shown in Figure p2. The means provided for thus yieldinglysupporting the upper ends of the bags preferably consists in theprovision of a bar 32 arranged within the closed end of the bag andhaving an I-bolt 33 secured thereto which extends through the wall ofthe bag and has a spring 34 connecting it with the supporting bar 31.Thus it will be seen that the bags lwill be held in an upright tautposition. If desired, however, the tension springs 34 may be dispensedwith and the I-bolts 33 connected to the supporting bar 31 by means of apiece of wire passed therethrough and around the bar.

In the operation of the device, the dustladen air will circulate throughthe casing 11, as indicated by the arrows in Figure 1, thence upwardlythrough the elongated openings 29 in the lower wall 27 of the clean airchamber 21. From these openings, the air will enter the compartments inthe bags 'andY will outwardly pass therefrom through the walls of thebag, the dust carried upward-ly into the bags by the air being collectedwithin the compartments tlireof, and only the clean air passing throughthe walls of the bag into the clean air chamber 21. The bags arepreferably constructed of a fine mesh cloth although other materials maybe used. From the chamber 21, the clean air will be discharged throughthe discharge opening 35 into a suitable receiving trunk, not shown.

Means -are also provided for shaking or agitating the bags to dislodgeand remove the dust therefrom when a considerable amount of dust hasbeen accumulated therein. The means provided for thus shaking the bagsis clearly shown in'Figure 4, and comprises a plurality of U-shaped rods36 having their ends suitably' secured, by such means as the threadednuts 37, to a reciprocally mounted shaker bar 38 mounted in bearings 39provided in the walls of the casing 11. Means are provided for actuatingthe bars 38, and therefore the U-shaped rods 36, and as here showncomprises an upright oscillating arm 41 pivotally mounted on a bracket42 secured to the wall of the casing. The arm 41 is oscillated by meansof a cam 43 mounted upon a back gear 44 driven by a pinion 45 mounted onthe shaft of a motor 46, (see Figures 2 and 4). When the motor 46 isstarted, a reciprocatory movement will be imparted to the bar 38,thereby causing the parallel side members of the U-shaped rods 36 toalternately engage the sides of the bags thereby imparting a shaking andagitating movement to the bags which will cause the dust accumulatedtherein to become dislodged and precipitated through the elongatedopenings 29 in the lower Wall 27 and into the hopper 12 arrangedtherebeneath. The U-shaped shaker rods 36 are preferably arranged so asto engage the central portions of the bags, which has been found to bemore effective in dislodging the dust accumulated therein. A hinged dooror gate 47 is preferably provided at the apex or bottom of the hopper12, and this gate is normally retained in closed position. When,however, sufficient sand and grit has been accumulated in the bottom ofthe hopper to `cause the weight thereof to a-utomaticallv open the gate47, the latter will be opened to allow the contents of the hopper to bedischargedi'therefrom into a suitable receiving means, not shown. Assoon as the hopper has thus been emptied the gate will automaticallyclose and prevent the/escape of air therethrough until again opened bythe weight of material accumulated in the hopper. A manhole 48 ispreferably provided in the wall of the casing 11 through which accessmay be had to the interior thereof.

Th* purpose of forming the bags with a plurality of compartments, asabove described, is to prevent the side walls thereof to contact withone another, when inflated, 1n the operation of separating the dust fromthe air. If the walls of the bags are allowed to contact `with oneanother during the operation of the apparatus the contacting portions ofthe bag walls will be rendered inoperative and will thereby reduce thecapacity of the apparatus. By the novel' arrangement and construction ofthe bags here shown, it will be impossible for the walls of adjacentbags to contact with one another during the operation of the -separatorwhich, therefore, will tend to greatly increase the capacity thereof.

In Figure 7, there is shown a modified construction of securing thelower open end of the bag to the lower wall"27 of the clean air chamber21. In the construction here shown the annular groove 26 has beeneliminated from the frame and a grooved cleat 4,9 is provided whereinthe bead 26-of the bag will be seated when the cleat 29 is secured totheframe 27 as shown. y v Figure 8 illustrates a modified construction ofthe shaker'rods 36. As here shown instead of each bag being encircled bya shaker member or rod as shown in Figure ,4, a plurality of straightrods 51 are interposed between the bags which are so arranged as toengage the side walls of the bags when the shaker barv 38isreciprocated. When the latter construction is used, it will benecessary, of course, to increase the travel of the shaker bar 38 inorder that the rods 51 will be brought into contact with the walls ofthe bags.

I claim as my invention:

l. A hollow structure as a suction casing divided by a horizontalpartition into upper and lower chambers, one a bag chamber, thepartition having an opening therein, a bag having an open lower endarranged sealingly around the opening, means yieldingly attaching theupper closed end of the bag to hold it in taut condition, a barhorizon-- tally slidable in the casing walls and traversing the bagchamber and having beater elements mounted thereon, one at each side ofthe bag, and spaced from its walls, and means for obtaining anoscillation of the bar, vibratory in character, alternately in oppositedirections. v

2. Ac hollow structure as a suction casing divided by a horizontalpartition into upper and lower chambers, one a bag chamber, thepartition having openings therein spaced apart, bags cach having an openlower end arranged sealingly around .one opening, means yieldinglyattaching the upper closed end of each bag to hold it in taut condition,a bar horizontally slidablel in the casing walls and traversing the. bagchamber and having beater elements mounted thereon one at each side ofeach bag and normally spaced from the bag walls, and extending the fulllength of the gre-test transverse dimension of the bag, and means forobtaining an oscillation of the bar, vibratory in character, alternatelyin opposite directions.

3. A vhollow structure as a suction casing divided by a horizontalpartition into upper and lower chambers, one a bag chamber, thepartition having openings therein spaced apart, bags each having an openlower end arranged sealingly around one opening, means yieldinglyattaching the upper closed end of each bag centrally of thev bag to holdit in taut condition, a bar horizontally slidable in the casing wallsand traversing the bag chamber laterally of the bags, and having mountedthereon beater elements relatively flexible, one at each side of eachbag, and spaced from the walls of the bags, substantially at the levelof the vertical middle of theV bag, extending the full length of thegreatest transverse dimension of the bag, and means for obtaining anoscillation of the bar, vibratory in character, alternately in oppositedirections.

In witness whereof, I have hereunto set my hand this 22nd day ofNovember, 1924.

RICHARD RUEMELIN.

